Apparatus for constructing concrete floors



Dec, 1.9 1922.

N. F. AMBURSEN.

APPARATUS FOR CoNs'TRucTING CoNRETE FLooRs 2 SHEETS-SHEET l FA L'ED SEPT. 4. 19W.

msnm

Dec. 19 1922.

N. F. AMBURSEN. APPARATUS PoR CoNsTRucTmG CoNcRsTz FLooRs.

2 SHEETS-SHEET 2 F l LED SEPT. 4. i917.

Patented Der. 19, 1922.

NILS, FREDERICK AMBURSEN, lFy NEWTON, MASSACHUSETTS, ASSIGNOR, BY MESNE ASSIGNMENTS, TQ AMBURSEN ENGNEERING COMFANY, k CORPOEATQN OF DELA*- WARE.

APPARATUS FORCONSTRUCTING CONCRETE FLOORS.

Application led September' 4, 1917. Serial No. lff?.

T 0 all whom t may concern.'

lBe it known that I, NILs FREDERICK AM- nonsnN, a citizen of the United' States, and resident'of Newton, in the county OtMiddleseX and State of Massachusetts, have invented' a new and useful Improvement inV Apparatus for v Constructing` Concrete Floors, of which the following is a specitication.

The object of the present invention which is an improvement on the apparatus for constructing concrete floors described my United States Letters Patent, No. 1216644, dated February 20, 1917, is to provide means whereby the floor beams may be reduced Vin ydepth without weakening the molded structure, thereby effecting a saving in the material required to` malte a floor'of given strength.

lilith these and other objects in view my invention comprises laterally-spaced concrete-form supportmembers, which maybe channelirons as described in my Letters Patent aforesaid, and concrete forms which preferably are sheet metal domes spanning the space between veach pair of support members and having the lower edges of two opposite sides resting on the websthereofso that the support members and the sides of each pair of adjacent domes resting thereon form longitudinal beam boxes, the lower edges of the other two lsides off the domes extending horizontally outwardly and beingl placed in contact with the corresponding edges ofthe adjoiningforms so that thelastmentioned sides of each pair of adjacent domes and the outwardly extending lower edges thereof form transverse beam boxes of substantially the same width as the longitudinal beam boxes.` .f desired, the outwardly eX- tending lower edges which do not rest lon the support members may terminate in down-turned lips and means may be provided for temporarily securing them to the corresponding lips., of the juxtaposed forms to increase the strength of the mold'.v

My invention further comprises the parts and combinations of parts set forth in the appended claims.

An illustrative embodimentof my invention is shown in the accompanying drawings wherein Figure 1 is a plan view showing the forms in position before the concrete has been poured.

Fig. 2, is a transverse section taken on a line 2-,2 of Fig. l, and

Fig.` 3 is ay longitudinal section taken on a line 3 3'of Fig. l.

In the particular drawings selected for more fully disclosing my invention, l, l, represent light channel-irons having flanges `2, 2, such .as described in mypatent above the'other two sides of each dome extend.

horizontally outwardly and are placed in contactwith the corresponding edges of the adjoining domes, as shown at 6, 6, soy that the vsides of each pair of adjacent domes and said outwardly extending lower edges thereof form transverse bea-nr boxes 9, 9 of substantially the same width as the longitudinal beam boxes 5. It willbe apparent that'sby means of this construction the longitudinal andk transverse beams may each be much lighter than` it'longit-.udinal beams only were employed in the manner described in my Letters vPatent aoresaid and that the material required for both sets of beam boxes may be considerably less thanthat required fora door offgiven strength constructed in kaccordance with` said Letters Patent. In order to increase the,strength of the mold the. lower edges 6, 6 may terminate in down-turned lips 7. 7 and said lips may be temporarily secured to the corresponding lipsotthe juxtaposed domes by any suitable means such as` the bolts 8.

As shown in Fig. 2, the ends of said lips 7 7 are beveled so as to forma space between eachend of a lipv andy the iianges of ythe adjacent channels and thereby prevent said lips from interfering with ythe ready positioning of the domes between a pair of adjacent channels. The outwardly extendmembers such as the rods 11 preferably are l placed in the beam-boxes 9, both sets of reinforcing rods extending throughout the length of their respective beam-boxes which for this reason must ie unobstructed. Clamping members 12 arranged transversely of the channels and locatedv between the flanges thereof force the lower edges 4,

of the domes against the channel flanges.

lbolts 13 passing through the channels .at

suitable intervals and either having threaded engagement with the clamps 12 as described in said patent or else having the nuts 14: threaded to their ends which project above the clamps as shown in Fig. 2.

After a floor mold had been constructed in the manner above described concrete 15 is poured therein and allowed to harden, whereupon the bolts 8 and 13 are removed and the forms and supportingmembers taken down for further use. y

As will be obvious, the depth of the longitudinal and transverse beams which are formed in the boxes 5 and 9 respectively may be considerably less than where floors having longitudinal beams alone are' used without weakening the molded structure, thereby saving a comparatively large amount of material and also increasing the head-room of the floor below, and inasmuch as the channels or concrete-form supportmembers which, as above stated, form part of the longitudinal beam-boxes, constitute the sole supports for the domes, no transversey supporting members lare necessary thereby eliminating an element, which sofar as I am advised, heretofore has been found essential. Furthermore by making the longitudinal beam-boxes k5 deeper than the transverse beam boxes 9, as shown in Figs. 2 and 3, I am enabled to effect a saving in material as more fully explained in my application Serial No. 306,553, tiled .Iune25, 1919,: in which I claim the concrete floor produced by the apparatus claimed herein.

It will be understood that various modifications may be made in the particular apparatus above described without departing from the principle of my invention.

Having thus described an illustrative embodiment of my invention without, however` limiting the same thereto, what I claim and desire to secure by Letters Patent of the United States isi 1. Apparatus for constructing concrete ygitudinal` beam-boxes arran minating in down turned lips, said lips being `placed in contact with the corresponding lips of the adjoining forms, the last named sides of each pair of adjacent forms and the outwardly extending lower edges thereof forming unobstructed transverse beam-boxes of substantially the same width as said longitudinal beam-boxes and arranged to receive reinforcing members extending throughout the length thereof.

2. Apparatus for constructing concrete floors, comprising in combination removable laterally-spaced channels, `removable sheetmetal integral dome-shaped concrete forms each being supported solely by having the lower edges of two opposite sides resting on a pair of adjacent channels, said channels and the sides of each pair of adjacent forms resting thereon forming unobstructed lon- Iged to receive reinforcing members vextending throughout the ylength thereof, means for clamping the adjacent lower edges of each pair of forms to the flanges of a channel, the lower edges of the other two sides of each form extending horizontally outwardly and terminating in down-turned lips, and means for clamping together the juxtaposed lips of each pair of forms, the last named sides of each pair of adjacent forms and the outwardly extending lower edges thereof forming` unobstructed transverse beam-boxes of substantially the same width as said longitudinal beam-boxes and arranged to' receive reinforcing members extending throughout the ylength thereof.

3. In an apparatus for constructing concrete floors, a concrete form consisting of, a sheet-metal integral dome having the lower edges of two opposite sides ext-ending hori- Zontally outwardly and terminating 'in down-turned lips, the ends of each lip being beveled.

In testimony whereof, I have hereunto subscribed my name this 1st day of Sept.

NILS FREDERICK AMBURSEN. 

